If you are getting the "Fastboot device driver missing" error when trying to use Fastboot on your computer, it means that the necessary device drivers are not installed on your system.
Here are some steps you can try to fix the problem:
Make sure that you have installed the latest version of the Android SDK Platform-Tools package, which includes Fastboot. You can download it from the Android developer website.
Download Fastboot Driver.
Connect your device to your computer using a USB cable. On your computer, go to the Device Manager.
In Windows, you can do this by right-clicking on the Start menu and selecting "Device Manager".
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Look for your device under the "Other devices" or "Unknown devices" category. It may be listed as "Android" or "Fastboot".
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Right-click on your device and select "Update driver".
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Select "Browse my computer for drivers".
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Select "Let me pick from a list of available drivers on my computer".
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Select "Show All Devices" and click on "Next".
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Now Click on Browse to select the driver file.
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From the "Fastboot Driver" and select on "android_winusb.inf" file and click on "open".
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From here click on "Android ADB Interface" and click on "Next".
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Select "Yes" to continue the installation.
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Click on "Install".
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Windows has successfully installed.
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Once the update was successful, your device should now be listed under the "Android Device" or "Android Phone" category in the Device Manager.
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If these steps don't work, you may need to manually install the device driver by downloading it from your device manufacturer's website or by using a driver installation utility like Driver Easy (https://www.drivereasy.com/).
